Grinder.



W. S. PORTER.

GRINDER. APPLICATION FILED SEPT. 11'. 1914.

1,119,728. Patented Dec.1,1914,

./i-rToR/VLY.

ymurnn STATES PrENT carica. i

WILLIAM S. PORTER, OF BINGHAMTON, NEW YORK, -ASSIGNOB TO S. CHENEY &SON, OF MANLIUS', kNEW YORK, A CORPORATION OF NEV YORK.

(3i-BINDER.

Application led- September 11,1914. Serial No. 861,211;

.7'0 all whom t may concern.'

Be it known that I, WILLIAMS. PORTER, of Binghamton, in the county ofBroome, 1n the State of New York, have invented new and usefulImprovements in Grinders, of which the following, taken in connectionwith the accompanying drawings, is a full, clear, and exact description.

This invention relates to certain improvements in grinders, andmoreparticularly to an attachment adapted to be used in connection withan ordinary grinder in sharpening'mower knives and similar articles.

The primary object of the invention is to provide a device which mayberigidly and quicklyattached to a grinder when it is def sired to use thesame in sharpening mowerknives and such articles, and which may bereadily removed so that the grinder may be used for ordinary shopgrinding or other purposes.

Other objects and uses will appear from ,thel following description,taken in connection with the accompanying drawings, in whichf Figure lis a side elevation ofa grinder having the attachment secured thereto.Fig. Q is a top plan view of the same. Fig. 3 is a cross section on line3 3, Fig. l. Fig. l'

is a cross sectionon line 4 4, Fig. Q. Fig.

5 is a cross section on line 5 5, Fig. Q.

The device illustrated in the drawings comprises a frame or body portionin the form of a case 1 having a `pair 0f 'laterally projectinghorizontally disposed arms Q and 8 respectively, and lbelow the arms Qand 3 a third laterally projecting horizontally disposed arm {l, allarranged and positioned so that the arms Q and 3- are adapted to restupon thev surface of a bench, table or otherl suitable supporting means,and the arm' 4' to project beneath the vbench or table, the latter armprovided with an internally threaded opening for the reception of anadjustable externally threaded clamping bolt 5 adapted to clamp theframe to the supporting means.

The case 1 incloses a relatively large gear 6 mounted upon a shaft 7journaled in bearings 8 and 9 in op-l posite sides of the case, and thisshaft 7 may be rotated to rotate the gear 6 by means of a suitableoperating handle 10- ASpecification of Letters Patent.

Patented Dec. 1, 1914.

`mounted on projecting end lof said shaft.

The gear 6 is in mesh with a relatively` small gear 1l preferably formedintegral with a shaft 1Q likewise journaled in bearings formed inopposite sides of the case 1 and having a projecting end upon which ismounted a suitable grindv ing or abrasive element 13 Projecting from thecase 1 is a suitable slotted arm" l% upon which is adjustably mounted atool shelf 15 ,'v said shelf adapted to be held in any desired position,either vertically or horizontally, .by

means of a bolt l6 seated in the respec-l tive slots in the arm and thebase of the 'y shelf.

The device so far described is adapted lfordgeneral use in grindingtools of any The removable 'attachment for use i ,i

grinding mower knives and similar articles comprises a platform 17having a pair of verticallyprojecting spaced arms 18 and 19respectively, adapted to contact with one face ofthe case 1 and disposed.l

upon opposite sides of the horizontally disposed arms Q- and 8 andvcontacting therewith'to preventk horizontall movement of the platformwhen secured to the case by means of a pair of spaced clamping membersQO- and Q1 spaced apart a sufficient distance to receive between themthe case 1 and pivotally mounted upon the platformy l7 by means of'boltsQQ and Q3 respectively, to swing horizon tally about the case 1 each armpro-` vided with a threaded 'opening in its free end adapted to receivethreaded clamping bolts Qeland Q5 respectively, for removably clampingthe platform 17- to the case 1 f The under side of the platform 17 isprovided with a pair of legs 36 and 37 respectively, spaced apart adistance equal to the distance between the arms Q and 3 and sopositioned laterally of the platform as to rest upon the outer portionsof the arms Q and 3 respectively, and support the platform, when clampedto the case 1 by means of the clampingl members Q0 and Q1 againstvertical and downward movementi The opposite end portions of theplatform 17 are somewhat raised or offset above the plane of theplatform and are provided with openings F26- and 2?- for receiving andpivotally supporting a knife-rest 28H having a curved end -29- forreceiving the knife-holders or cutter-bar. The central portion of theplatform 17M at its outer edge is provided With a longitudinal slot, anda suitable vertically disposed bracket -30- is adj ustably connected tothe platform by means of a bolt #3lpassing through the slot in theplatform and through an opening in a horizontally disposed portion ofthe bracket. A second knife-rest 3Q- is pivotally mounted upon the upperfree end of the bracket -30 to swing toivard and aivay from the abrasiveWheel -l-3-, and the bracket --30 and knife-rest m32 are provided withcoacting stops or lugs` bS3-M, and #34* and --35-, respectively, forpreventing relative movement of the parts beyond a predetermined point.

When it is desired to use the grinder for grinding mowing machine knivesand simi,- lar articles, the platform 17 with its knife-supportingelements is readily and quickly attached to the case -lof the grinder bymerely placing it against the grinder so that the arms 18 and -19contact with the arms H2- and -3-, and then swinging the clampingmembers' Q0- and -2labout the case 1 and adjusting the clamping screws-2land b25 and when it is desired to use the grinder for other purposes,the attachment may be readily removed by merely loosening the clampingscrews and withdrawing the clamping members from about the case --l-.

Although 'l have illustrated and described one particular form ofattachment and means for attaching the same, it Will be readily apparentthat changes may be made in the details of construction, arrangement andoperation, Without departing from the spirit of this invention as setforth in the appended claims.

TvVhat I claim is:

l. ln a device of the class described, a frame having a laterallyprojecting arm micras upon one side thereof, a platform resting uponsaid arm, and means for clamping the platform to the frame.

2. ln a device of the class described, a frame having a laterallyprojecting arm upon one side thereof, a platform, a leg de pending fromthe platform and resting upon the laterally projecting arm, and meansfor clamping the platform to the frame.

3. ln a device of the class described, a grinder frame having laterallyprojecting arms, a platform having arms contacting with said laterallyprojecting arms to prevent horizontal movement of said platform, andmeans for clamping the platform to the frame.

In a device of the class described, a grinder frame having laterallyprojecting arms, a platform having vertically disposed arms contactingWith the laterally projecting arms to prevent horizontal movement ofsaid platform, legs upon said platform i and resting upon the laterallyprojecting arms to support the platform, and means for clamping theplatform to the frame.

5. ln a device of the class described, a grinder frame having alaterally projecting arm forming a portion of the means for attachingthe frame to a support, a platform resting upon the laterally disposedarm, and means for clamping the platform to the frame.

6. An attachment for grinders comprising a platform, a lnife-supportmounted thereon, and clamping members pivotally mounted` on the platformand adapted to removably clamp the platform to a grinder j frame.

7. An attachment for grinders comprising a platform, a knife-supportmounted thereon, and clamping members mounted on the platform andadapted to removably clamp the platform to a grinder frame.

ln Witness whereof l have hereunto set my hand this 2nd day of September191i.

WM. S. PORTER.

Witnesses F. M. BARNUM, S. C. CHENEY.

Gopes of this patent may be obtained for ave cents each, by addressingthe Commissioner of Patents,

Washington, ID. C.

